PSP 6.61 Infinity Hybrid Firmware by Davee, LME & PRO CFW Patch | PSXHAX - PSXHACKS
Release: 6.61 Infinity • lolhax.org
Infinity 2.0 released for the PSP, allows for persistent CFW on all models of PSPs on 6.60 and 6.61 | Page 2 | GBAtemp.net - The Independent Video Game Community
Does anyone one know how to remove this old 2.71 SE-C CFW and get it to run 6.61 infinity? : r/PSP
PlayStation Guide
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
UMD drive doesn't work after updating to 6.61 Infinity PRO CFW : r/PSP